Blue Plumbago: Growing Methods and Pruning Tips

Although the Start of Autumn has just passed, many regions are still shrouded in waves of heat. The scorching high temperatures have left many plants looking listless, but Blue Plumbago blooms right through the heat, its pale blue flowers set against green leaves bringing a refreshing chill. The Blue Plumbago introduced today is not the Blue Plumbago we usually talk about. This Blue Plumbago belongs to the genus Plumbago in the family Plumbaginaceae, whereas the Blue Plumbago we commonly refer to belongs to the genus Ceratostigma in the family Plumbaginaceae, and its real name is Ceratostigma plumbaginoides; it is a close relative of the true Blue Plumbago.

1. Ample Light

Blue Plumbago loves light, and it is precisely this light-loving nature that allows it to bloom beautifully in summer. When caring for Blue Plumbago, note that the plant must be given long daylight hours and a full supply of water. Even if the potted plant is placed under the blazing midsummer sun, Blue Plumbago will still bloom profusely. Conversely, insufficient light will reduce the number of Blue Plumbago blooms, and the branches will become soft and weak, leading to lodging.

2. Plenty of Water

Compared with flowers such as dahlias and hollyhocks, the petals of Blue Plumbago are much thinner and more delicate. Because of the soft, thin nature of its leaves, once the plant lacks water, the petals very easily dry out and wilt. Although you can water afterward to remedy it and let the plant revive, the condition of the petals and leaves will still be far worse than before, and blooming will also become intermittent. Therefore, during the blooming period of Blue Plumbago, you must ensure a full supply of water. Besides switching to a larger pot, you can also place a tray under the pot to hold water, just in case.

3. Timely Fertilizing

Blue Plumbago has a very long flowering period. As long as it is cared for properly and the environment is suitable, Blue Plumbago can bloom continuously from early summer all the way to late autumn. Because the plant produces a great many flowers, timely fertilizing is needed to replenish its nutrients. When fertilizing, it is best to apply liquid phosphorus fertilizer. Liquid phosphorus fertilizer is both easy for the plant to absorb and able to meet the needs of blooming. However, there are also certain tricks to choosing fertilizer. If you want to train Blue Plumbago into a flower wall, you can choose a nitrogen-phosphorus-potassium fertilizer. If you want to control the plant's shape and make the potted plant rounder, cuter and fuller, you can choose a fertilizer high in phosphorus and potassium.

4. Timely Pruning

Some rather skilled gardening enthusiasts have pruned their Blue Plumbago plants into a lollipop shape; seen from a distance, it looks simply exquisite. Because Blue Plumbago's branches are slender, soft and easy to prune, it is very easy to create all kinds of shapes. To keep Blue Plumbago at a high ornamental value, timely pruning is very necessary. Daily pruning mainly involves two tasks: first, promptly cutting off spent flowers so the plant will produce new flowering branches; second, pruning away excess branches beyond the desired shape, so Blue Plumbago can continue to show off its lovely side.

The above is the editor's summary of the growing methods and care points for Blue Plumbago. Many friends have found when caring for Blue Plumbago that small white dots easily appear on the underside of the leaves. Most gardeners think Blue Plumbago has caught powdery mildew. In fact, these small white dots (white powder) are not powdery mildew but salt. Because Blue Plumbago is an alkali-tolerant plant, during growth it can expel excess salt from its body to maintain its healthy state. At the same time, this signal also reminds friends that the potting soil has become somewhat saline-alkaline and that measures need to be taken to improve the soil. Alright, that is all for today's content on Blue Plumbago; friends who like Blue Plumbago must not miss it.

How to grow Blue Plumbago? Growing methods and precautions for Blue Plumbago

Blue Plumbago, also known as shanhuichai, jiaozhuhua and so on, is a perennial herbaceous plant of the genus Plumbago in the family Plumbaginaceae. Blue Plumbago's flowers and leaves are delicate and lush, and its flower color is a cool, noble blue; it has very high ornamental value and is suitable for growing in pots indoors. So, how do you grow Blue Plumbago? The growing methods and precautions for Blue Plumbago are introduced below.

Image: Blue Plumbago

1. Growing Methods for Blue Plumbago

1. Soil:Blue Plumbago likes loose, fertile, well-drained, slightly acidic soil. The growing medium can be prepared from materials such as leaf mold, garden soil and coarse sand.

2. Temperature:Blue Plumbago likes a warm environment and is not cold-tolerant. The suitable growing temperature is 18-25°C, and in winter it can overwinter safely at temperatures above 7°C. When the temperature is higher in spring, you can open doors and windows for ventilation; a higher room temperature is good for Blue Plumbago's growth and blooming.

3. Light:Blue Plumbago likes plenty of sunlight, tolerates partial shade, and dislikes intense direct sun. When growing Blue Plumbago indoors, place it in a sunny spot and let it receive several hours of sunlight each day. In summer, shade should be provided to prevent intense sun exposure; in winter, give Blue Plumbago plenty of light so it can overwinter safely.

4. Watering:During vigorous growth, Blue Plumbago needs a lot of water. To keep the environment around the plant moist, you can spray water on the leaves of Blue Plumbago or place the pot on damp stones. Reduce watering in winter; just make sure the potting soil does not dry out completely.

Image: Blue Plumbago

5. Fertilizing:During the growing season, apply fertilizer once every half month to Blue Plumbago. After Blue Plumbago sprouts, nitrogen fertilizer should be the main type; after May, increase the application of phosphorus and potassium fertilizer to promote abundant blooming. Stop applying nitrogen fertilizer in September and apply phosphorus and potassium fertilizer twice to improve the plant's cold resistance. Stop fertilizing in winter.

6. Repotting:Repot Blue Plumbago once every spring. Take the plant out of the soil, remove some of the old soil, cut off rotten roots and old roots, replace with new growing soil, and replant.

7. Pruning:In spring, carry out one pruning along with repotting. Cut off overly dense branches and thin, weak branches, and shorten overly long branches, so that Blue Plumbago's plant shape is neat and round with good ventilation and light penetration. For old plants over 3 years old whose growth vigor has declined, increase the amount of pruning, and apply fertilizer after growth to encourage the sprouting of robust new branches and promote blooming. After flowering, remove spent flowers and thin out weak, spindly branches.

Image: Blue Plumbago

2. Precautions for Growing Blue Plumbago

Blue Plumbago grows at the foot of low hills and on flat ground. It likes warmth and is not cold-tolerant. In North China and other temperate regions, it is cultivated as a greenhouse flower. The suitable growing temperature is 25°C. It likes light, tolerates slight shade, and should not be exposed to blazing sun. It requires a moist environment; dryness is unfavorable to its growth. It is not drought-tolerant and is best grown in humus-rich, well-drained sandy loam. Blue Plumbago is propagated by cuttings. Blue Plumbago cuttings can be taken in spring. Select sturdy, plump one-year-old branches and cut them into 8-10 cm pieces as cuttings, insert them into growing soil, and cover with plastic film. Keep the indoor temperature at 20-24°C, and after 20-25 days the Blue Plumbago cuttings can take root.

[Editor's Conclusion]Blue Plumbago's flowers are elegant and fresh, with an intoxicating sky blue, making it very suitable for growing indoors. The above has introduced the growing methods and precautions for Blue Plumbago, and I hope it can be of help to everyone!

How to prune Blue Plumbago, pruning methods for Blue Plumbago

Blue Plumbago grows vigorously, tolerates heat, is relatively tolerant of high temperature and high humidity, has few pests and diseases, is simple to manage, and has a long ornamental period. Its leaves are emerald green and its flowers are elegant; in the hot summer it gives a feeling of coolness, and it can be grown in pots to accent a room or balcony. Its flowering ornamental period is also long, so for a better ornamental effect, how should Blue Plumbago be pruned?

Pruning Blue Plumbago requires certain skills, and the timing of pruning should also be noted. When is the most suitable time to prune?

The most suitable time to prune Blue Plumbago is in late autumn. In late autumn, Blue Plumbago's growth enters a slow phase; pruning at this time will not damage Blue Plumbago, and after pruning it can grow better.

Pruning Blue Plumbago requires mastering techniques. Blue Plumbago itself is a plant that is not afraid of pruning, so once you master the techniques it is easy to prune.

First, after Blue Plumbago's flowering period ends, cut off the remaining faded flowers to prepare for the next blooming; in this way, new flowers will appear after about a month.

When Blue Plumbago is moved indoors for growing in autumn, prune the old branches. Cut away the old branches, leaving only the newly grown sturdy green branches.

Second, you can shave off the head of the Blue Plumbago tree, leaving only the main trunk. If a branch has too many leaves, you can cut off a few leaves and keep the fresh, tender leaves, which will encourage healthy growth of the branches.

Finally, pay attention to the weather when pruning Blue Plumbago. If there is a lot of rainy weather, prune the stems of Blue Plumbago frequently, otherwise they will grow longer and longer. When the weather is warm, prune less; when the temperature is high, you can prune its branches, and this will cause many new buds to sprout.

When pruning Blue Plumbago, be sure not to prune during the spring budding period or only just begin pruning.

Pay attention to the environment and temperature for pruning Blue Plumbago. In rainy, dry and cold weather, strengthen the pruning of the stems; on warm sunny days, reduce pruning. After pruning, also wrap the cut with a moist cloth to prevent the cut from becoming inflamed due to mild weather and affecting new growth.

1. Blue Plumbago is not afraid of pruning. After flowering, cut off the spent flowers, and it can bloom again in about 20-30 days. Old branches must not be more than two years old; generally, when moving it indoors each autumn, prune hard, cutting off black branches and leaving only the sturdy green branches newly grown that year.

2. On November 30, having nothing to do, I shaved the head of a pot of Blue Plumbago tree, pruning off 60 cm heavily and leaving a main trunk of about 50 cm.

3. When a branch grows seven leaves, cut off four; or when it grows five leaves, cut off three. Then the branch will become sturdier, and there will also be more side branches and small leaves. Especially when there are several consecutive days of rain, if you do not prune the stems they will grow very, very long. But once the temperature is about right and flower buds have formed, prune less. Cutting back to overly old branches means new buds sprout slowly too; it is best when growth is vigorous and the temperature is above 25°C, as high temperatures give good branching, and one cut can produce three or four buds, while below 20°C generally only one bud sprouts at the very top.